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avformat/hlsenc: use av_random_bytes() for generating AES128 key

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av_random_bytes() can use OS provided strong random functions and does not
depend soley on openssl/gcrypt external libraries.

Fixes ticket #10441.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
2023-07-02 20:57:47 +02:00
parent 9a7f060c32
commit 36f4e6f8f4
2 changed files with 2 additions and 22 deletions
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libavformat/hlsenc.c
+2 -21
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@@ -27,12 +27,6 @@
#include <unistd.h>
#endif
#if CONFIG_GCRYPT
#include <gcrypt.h>
#elif CONFIG_OPENSSL
#include <openssl/rand.h>
#endif
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavutil/avstring.h"
@@ -40,6 +34,7 @@
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/log.h"
#include "libavutil/random_seed.h"
#include "libavutil/time.h"
#include "libavutil/time_internal.h"
@@ -710,20 +705,6 @@ fail:
return ret;
}
static int randomize(uint8_t *buf, int len)
{
#if CONFIG_GCRYPT
gcry_randomize(buf, len, GCRY_VERY_STRONG_RANDOM);
return 0;
#elif CONFIG_OPENSSL
if (RAND_bytes(buf, len))
return 0;
#else
return AVERROR(ENOSYS);
#endif
return AVERROR(EINVAL);
}
static int do_encrypt(AVFormatContext *s, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
@@ -775,7 +756,7 @@ static int do_encrypt(AVFormatContext *s, VariantStream *vs)
if (!*hls->key_string) {
AVDictionary *options = NULL;
if (!hls->key) {
if ((ret = randomize(key, sizeof(key))) < 0) {
if ((ret = av_random_bytes(key, sizeof(key))) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot generate a strong random key\n");
return ret;
}